TC-U4 Stereo Cassette Deck with Auto Play Function. - Model: TC-U4 - Type: Stereo Cassette Deck - Input/Output Terminals: MIC, Headphones - Power: 100V, 50/60Hz - Features: Auto Play Function Thank you for viewing. The power turns on, and tape playback is possible, but since there is no amplifier, sound output has not been confirmed. Therefore, it is treated as junk, and we request that those who can perform maintenance or repairs purchase it. The deterioration of the internal belts, etc., is unknown.